i have been searching for about a month for what kind of muffler to put on my 07 V6. if you look at any recent threads about mufflers, chances are that they were mine, asking some question. just wanted to tell anyone interested in putting a new muffler on their truck, that the flowmaster original 40 is AMAZING!!! i have never done any exhaust work by myself before this, but i can say it was one of the easiest things i have ever done....and not to mention that my truck now sounds meaner than every v8 i pass. just wanted to say that i highly recommend the 40 series. and anything that tacomaman06 says...listen, he really knows what he's talking about. thanks for the help.
p.s. anyone who is worried about the muffler being too loud and obnoxious inside the cab...i have found myself turning off the stereo just so i can listen to the engine. and my engine is consistently running at about 500 RPMs lower than stock which is great for mileage.
last thing...i can definitely feel a bit of hp increase and better throttle response. does anyone have a general idea of how much extra hp you get out of a muffler like this?